Frontiers in Spectroscopy
Physics 880
Winter 2001
| Instructor: Terry A. Miller |
Phone: 292-2569 |
| Office: 18 Celeste Lab |
email: tamiller+@osu.edu |
Course Description: This course will provide students with an overview of topics on the frontier of spectroscopic
research. It will exploit internationally renowned lecturers, as well as outstanding OSU faculty, to cover topics ranging
from very fundamental to quite applied. General areas to be covered will include fundamental characteristics of molecular
quantum structure, electromagnetics, new experimental techniques, remote sensing, ultra-high sensitivity analytical
techniques, astrophysical applications, etc. It is planned that the course will be offered multiple times, with topics and
speakers varying with each offering. The lecturers for the upcoming Winter quarter are listed below.
Each topic will be covered by lectures on Wednesday and Friday mornings, 9:00-10:18AM, MP2015, with a discussion
period 9:00010:18AM on Thursdays in MP2015.
Prerequisites: Chemistry 866 or Physics 780.04 or permission of the instructor
Required Text: None; suggested articles for reading will be supplied prior to the lecture on a given topic.
Syllabus:
John B. Delos
, College of William and Mary (Jan. 10-12), "Classical Orbits and
Quantum Spectra"
- January 10 lecture - Chaos in Atomic, Molecular and Optical
Systems - From abstract Theory to Patented Devices
- January 11 discussion - The Semiclassical Approximation in Quantum
Mechanics General Theory and a "How-To" Manual
- January 12 lecture - Recurrence Spectroscopy: Classical Orbits and
Atomic Spectra
Herb Pickett, Jet Propulsion Lab (Jan. 17-19), "Atmospheric Spectroscopy"
Randall G. Hulet , Rice
University, (Jan. 31, Feb. 1, 2), "Bose Einstein Condensation"
- January 31 lecture - Bose-Einstein Condensation of
Attracting Atoms - The Atomic Supernova
- February 1 A more detailed discussion on the molecular
spectroscopy experiment. Also discuss the role of interactions
in quantum gases in more detail, depending on the interest of the
group.
- February 2 lecture - A Bose/Fermi Quantum Gas
Phil
Bucksbaum , University of Michigan (Feb. 7, 8, 9), Quantum control: Techniques and Applications
- February 7 lecture - Sculpting Wave Packets
Summary: Quantum control is the new science of controlling the internal
motion of electrons in atoms, or controlling atoms inside molecules or
in crystalline solids. This motion is governed by the rules of quantum
mechanics, but our tools for control are mostly classical optical
fields. The technology of control begins with intense ultrafast laser
pulses. In this first lecture, I'll review how ultrafast pulses are the
raw materials for scultping on the quantum scale, and show how wave
packets are produced and observed using pulse shaping and quantum
holography.
- February 8 lecture - Feedback control, and genetic learning
algorithms
Summary: One of the chief obstacles to quantum control is imprecise, or
imperfect knowledge of the microscopic system that we wish to change.
This lack of knowledge is partly due to the many-body nature of nearly
all quantum systems, and partly due to our inability to truly isolate a
small system against its environment. Strong ultrafast optical fields
combat these problems by decoupling the system from undesired degrees of
freedom, and by working quickly, before the environment can disrupt the
motion. To do their work properly, though, the fields must learn from
the system how best to shape themselves. This is the job of the genetic
algorithm and other learning algorithms.
- February 9 lecture - Applications of Coherent Control: quantum computing to
chemistry to x-rays
Summary: Quantum control techniques are leading to rapid progress in
many new fields of science. I'll reveiw our recent work in quantum
information science, and describe some of the basic concepts in quantum
computing where control is important. If time permits, I will also
speculate on future prospects for progress in bond-selective chemistry,
control of x-rays, and other fields.
Per Jensen , Universitaet Wuppertal (Feb. 21-23), "Local Modes"
"Local Mode Vibrations and Beyond"
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The lectures are concerned with the description of highly excited rotational
and/or vibrational states of molecules in terms of localized vibrations or
local modes. In this context, I make an attempt to unify the ideas and
notations of the key publications on the subject in a manner that treats the
vibrational and rotational motions equally and that demonstrates the
importance of molecular symmetry.
Emphasis is put on explaining the intimate relationship between
local mode vibrations and the formation of both vibrational and
rovibrational energy level clusters. In rovibrational cluster states,
a molecule can sustain localized vibrations for very many vibrational
periods, even at low vibrational excitation. Local mode behaviour is
induced by both vibrational and rotational excitation.
An important application of local mode theory is the derivation of relations
between the effective rotation-vibration parameters for highly excited
vibrational states of a molecule. I show, using the H2Se molecule
as example, that such relations are only valid for certain forms of the
effective rotation-vibration Hamiltonian. Thus caution is required when
the results of fittings to spectral data are compared with local mode theory.
The lecture on Wednesday deals with the description of the vibrational
energy level pattern of molecules at high excitation in terms of local
modes, whereas the Friday lecture is concerned with the effects of
localized vibrations on the rotational energy level patterns, in
particular formation of rovibrational energy clusters.
For Thursday, I suggest a more in-depth description of our own calculations
of four-fold energy level clusters in triatomic molecules.
Recommended reading:
--------------------
1. M. S. Child and L. Halonen, Adv. Chem. Phys. 57, 1 (1984)
2. P. Jensen, G. Osmann, and I.N. Kozin, in "Vibrational-Rotational
Spectroscopy and Molecular Dynamics" (D. Papousek, Editor), World
Scientific, Singapore, 1997.
3. P. Jensen, Mol. Phys. 98, 1253 (2000).
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Grading: Satisfactory/Unsatisfactory options: Class attendance and participation
Letter grade option: Class attendance and participation plus term paper
(Grades will be assigned solely by OSU faculty.)
Call number: 19293-3 (S/U option)
19294-9 (letter grade option - prerequisite=a previous spectroscopy course at OSU in Chemistry or Physics or prior
permission of the instruction)
Chemical Physics 894 - 1998 Chemical Physics 894 - 1999 Chemical Physics 894 - 2000